Ship Print Forge shop site (colors, photos, 3D viewer) (#2)

## Summary

- Rebrand the Django client template as Print Forge (`client_site` → `print_forge`) with shop + shipping enabled.
- Product listings support multiple photos, color variants (shared price/description/STL, per-color stock and photos), and a photo-first / 3D-second gallery.
- Public pages use 3D printer / printed-toy photography instead of leftover t-shirt mockups; beta CI deploys on `master`.

Closes #1
Infra: [server-infra#27](ai_ml_operations/server-infra#27) (easy deploy beta).

## Test plan

- [ ] Product page shows photo first, 3D model second; color swatches swap photos and stock
- [ ] Portal can upload multiple photos and per-color qty/images; STL stays shared
- [ ] Public home/about/gallery have no t-shirt mockups
- [ ] `manage.py test` passes
- [ ] After server-infra#27: beta deploy to `print-forge-preview.aimloperations.com`

Reviewed-on: #2

site/public/templates/emails/base_email.html

@@ -62,8 +62,8 @@
           <tr>
             <td align="center" style="padding:28px 24px 20px;border-bottom:1px solid #d9e3e4;">
               {% if logo_url %}
-              <a href="{{ site_url|default:'https://mkdrealtor.com' }}" style="text-decoration:none;">
-                <img src="{{ logo_url }}" alt="{{ brand_name|default:'Your Company' }} · EXIT Realty" width="160" style="display:block;width:160px;max-width:70%;height:auto;">
+              <a href="{{ site_url|default:'https://printforgeprints.com' }}" style="text-decoration:none;">
+                <img src="{{ logo_url }}" alt="{{ brand_name|default:'Print Forge' }}" width="160" style="display:block;width:160px;max-width:70%;height:auto;">
               </a>
               {% else %}
               <p style="margin:0;font-size:20px;font-weight:700;letter-spacing:0.5px;color:#00626c;">

site/public/templates/emails/campaign_complete.html

@@ -37,4 +37,4 @@
 {% endif %}
 {% endblock %}
 
-{% block footer_note %}Campaign summary from {{ brand_name|default:"Monica Dhillon" }}.{% endblock %}
+{% block footer_note %}Campaign summary from {{ brand_name|default:"Print Forge" }}.{% endblock %}

site/public/templates/emails/campaign_complete.txt

@@ -11,6 +11,6 @@ Suppressed: {{ suppressed }}
 {% if report_url %}Report: {{ report_url }}
 {% endif %}
 —
-{{ brand_name|default:"Monica Dhillon" }}
+{{ brand_name|default:"Print Forge" }}
 {{ site_url|default:"https://mkdrealtor.com" }}
 {% if brand_tagline %}{{ brand_tagline }}{% endif %}

site/public/templates/emails/contact_email.txt

@@ -1,4 +1,4 @@
-New contact form inquiry — {{ brand_name|default:"Monica Dhillon" }}
+New contact form inquiry — {{ brand_name|default:"Print Forge" }}
 
 Name: {{ name }}
 Email: {{ email }}
@@ -12,6 +12,6 @@ Message:
 {% if portal_url %}View in portal: {{ portal_url }}
 {% endif %}
 —
-{{ brand_name|default:"Monica Dhillon" }}
+{{ brand_name|default:"Print Forge" }}
 {{ site_url|default:"https://mkdrealtor.com" }}
 {% if brand_tagline %}{{ brand_tagline }}{% endif %}

site/public/templates/emails/marketing_email.txt

@@ -5,6 +5,6 @@
 —
 {% if prefs_url %}Manage preferences: {{ prefs_url }}
 {% endif %}{% if one_click_url %}Unsubscribe from email: {{ one_click_url }}
-{% endif %}{{ brand_name|default:"Monica Dhillon" }}
+{% endif %}{{ brand_name|default:"Print Forge" }}
 {{ site_url|default:"https://mkdrealtor.com" }}
 {% if brand_tagline %}{{ brand_tagline }}{% endif %}